modules/world: add a timer system to the actors

gamecore/modules/world/actors/actor2D.lua

@@ -22,7 +22,10 @@
   CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 ]]
 
+local cwd   = (...):gsub('%.actor2D$', '') .. "."
+
 local Actor2D = Object:extend()
+local Timer   = require(cwd .. "utils.timer")
 
 -- INIT FUNCTIONS
 -- Initialise the actor and its base functions
@@ -35,6 +38,7 @@ function Actor2D:new(world, type, x, y, w, h, isSolid)
 
   self:initKeys()
   self:register()
+  self:initTimers()
 
   self:setDebugColor(1, 1, 1)
 end
@@ -99,11 +103,32 @@ function Actor2D:getInput(keys)
   self.keys = keys or core.input.fakekeys
 end
 
+-- TIMER FUNCTIONS
+-- Control the integrated timers of the actor
+
+function Actor2D:initTimers()
+  self.timers = {}
+end
+
+function Actor2D:addTimer(name, t)
+  self.timers[name] = Timer(self, name, t)
+end
+
+function Actor2D:updateTimers(dt)
+  for k,v in pairs(self.timers) do
+    v:update(dt)
+  end
+end
+
+function Actor2D:timerResponse(name)
+  -- here come the timer responses
+end
+
 -- UPDATE FUNCTIONS
 -- Theses functions are activated every steps
 
 function Actor2D:update(dt)
-
+  self:updateTimers(dt)
   self:autoMove(dt)
   self:updateSprite(dt)
 end

gamecore/modules/world/actors/utils/timer.lua

@@ -0,0 +1,44 @@
+-- timer.lua :: a basic implementation of a timer for the actor system.
+
+--[[
+  Copyright © 2019 Kazhnuz
+
+  Permission is hereby granted, free of charge, to any person obtaining a copy of
+  this software and associated documentation files (the "Software"), to deal in
+  the Software without restriction, including without limitation the rights to
+  use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+  the Software, and to permit persons to whom the Software is furnished to do so,
+  subject to the following conditions:
+
+  The above copyright notice and this permission notice shall be included in all
+  copies or substantial portions of the Software.
+
+  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+  FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+  COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+  IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+  CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+]]
+
+local Timer = Object:extend()
+
+function Timer:new(actor, name, t)
+  self.time = t
+  self.actor = actor
+  self.name = name
+end
+
+function Timer:update(dt)
+  self.time = self.time - dt
+  if (self.time <= 0) then
+    self:finish()
+  end
+end
+
+function Timer:finish()
+  self.actor:timerResponse(self.name)
+  self.actor.timers[self.name] = nil
+end
+
+return Timer